Chemical Engineering

Question: For a first order chemical reaction, the rate constant
[A].

changes on changing the concentration units.

[B].

is not a function of the unit of time.

[C].

has unit of time-1.

[D].

none ofthese.

Answer: Option C

Explanation:

No answer description available for this question.

Question: A balanced chemical reaction equation conforms to the law of
[A].

conservation of mass

[B].

Avagadro’s hypothesis

[C].

gaseous volumes

[D].

none ofthese

Answer: Option A

Explanation:

No answer description available for this question.

Question: Chemical reaction rate of a component depends upon the
[A].

composition of the component only.

[B].

temperature of the system.

[C].

pressure of the system.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: A batch reactor suffers from following disadvantage.
[A].

Poor product quality control.

[B].

High labour and handling cost.

[C].

High shutdown time requirement for emptying, cleaning and refilling.

[D].

All (a), (b)and(c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance.
[A].

film diffusion

[B].

diffusion through ash layer

[C].

chemical reaction

[D].

either (a), (b) or (c)

Answer: Option B

Explanation:

No answer description available for this question.

Question: For the chemical reaction X Y, it is observed that, on doubling the concentration of ‘X’, the reaction rate quadruples. If the reaction rate is proportional to Cxn, then what is the value of ‘n’ ?
[A].

4

[B].

1/4

[C].

16

[D].

2

Answer: Option A

Explanation:

No answer description available for this question.

Question: For the chemical reaction P Q, it is found that the rate of reaction doubles as the concentration of ‘P’ is doubled. If the reaction rate is proportional to Cpn, then what is the value of ‘n’ for this chemical reaction ?
[A].

1

[B].

2

[C].

3

[D].

0

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a reversible reaction, a catalyst increases the rate of forward reaction
[A].

only.

[B].

to a greater extent than that of the backward reaction.

[C].

and decreases that of the backward reaction.

[D].

and the backward reaction equally.

Answer: Option D

Explanation:

No answer description available for this question.

Question: A liquid decomposes by irreversible first order kinetics and the half life period of this reaction is 8 minutes. The time required for 75% conversion of the liquid will be __________ minutes.
[A].

4

[B].

8

[C].

12

[D].

16

Answer: Option D

Explanation:

No answer description available for this question.

Question: A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.
[A].

less than

[B].

equal to

[C].

more than

[D].

equal to or more than

Answer: Option D

Explanation:

No answer description available for this question.